基于随机裂隙的长距离调水工程渠道边坡稳定性模拟  

Simulation of Channel Slope Stability of Long⁃Distance Water Transfer Project Based on Random Racks

作　　者：王栋 方攀博 韩延成 黄兆虎 邓晓川 赵嘉诚 WANG Dong;FANG Panbo;HAN Yancheng;HUANG Zhaohu;DENG Xiaochuan;ZHAO Jiacheng(School of Water Conservancy and Environment,Jinan University,Jinan 250022,China;Shandong Survey and Design Institute of Water Conservancy,Jinan 250013,China;Weifang Branch of Shandong Water Diversion Project Operation and Maintenance Center,Weifang 261000,China)

机构地区：[1]济南大学水利与环境学院,山东济南250022 [2]山东省水利勘测设计院有限公司,山东济南250013 [3]山东省调水工程运行维护中心潍坊分中心,山东潍坊261000

出　　处：《人民黄河》2023年第8期152-157,共6页Yellow River

基　　金：国家“十二五”科技支撑计划项目(2015BAB07B02-6);山东省自然科学基金资助项目(ZR2017LEE028);山东省重点研发计划项目(2016GSF117038)。

摘　　要：边坡稳定性对保障长距离调水工程安全输水十分重要。为了对比研究渠道两侧裂隙边坡和孔隙边坡的稳定性,利用Comsol有限元数值计算软件,将达西定律模块和固体力学模块进行流固耦合,建立渠道边坡二维随机裂隙模型,采用强度折减法模拟对比了两种降雨条件(历时长而强度弱、历时短而强度强)和改变初始地下水位条件下两种介质模型(裂隙模型和孔隙模型)渠道的边坡稳定性。结果表明:裂隙边坡较孔隙边坡塑性变形程度更大且更容易发生边坡失稳;不论裂隙模型边坡还是孔隙模型边坡,相同降雨条件下,地下水位越低,边坡越稳定;相同地下水位,降雨强度较小时边坡较稳定;裂隙模型边坡在高雨强条件下失稳时可能发生牵引式滑动。The stability of slope is very important to ensure the safety of long⁃distance water transfer project.In order to compare and study the slope stability of the fracture slope and the pore slope on both sides of the channel,this paper used Comsol multiphysics finite element nu⁃merical calculation software to establish a two⁃dimensional random fracture model of the channel slope by coupling the Darcys law module and the solid mechanics module.The strength reduction method was used to simulate and compare the slope stability of two media models(frac⁃ture model and pore model)under two rainfall conditions(long and weak,short and strong)and under the condition of changing the initial groundwater level elevation.The results show that the plastic deformation degree of the fractured slope is greater than that of the porous slope and the slope instability is more likely to occur;under the same rainfall conditions,the lower the groundwater level is,the more stable the slope will be,regardless of the fracture model or the pore model;under the same groundwater level,the slope is more stable when the rainfall intensity is smaller;traction sliding may occur when the fracture model slope is unstable under high rainfall intensity.

关 键 词：裂隙岩体 随机裂隙网络 流固耦合 强度折减法 边坡稳定性 

分 类 号：TV68[水利工程—水利水电工程] TV223